GSR seats lumber support?!?!?

OK i have a gsr seat w. lumber and side supports…and the lumber is stuck on it farthest setting which is annoying on long trips or even 30 min. trips…any one ever have this problem???..or you think i should just take it on myself and take the seat apart and see if i can fix it…never really messed w/ a seat but can learn…are the seats that complicated?